Door-knob



B. D.. STEVENS.

DOOR KNOB.

No. 247,130. Patented Sep't. 13,1881.

UNITED STATES PATENT OFFICE.

BENJAMIN D. STEVENS, OF CAMBRIDGE, ASSIGNOR TO CHARLES C. HAR- RINGTON, OF NEWTON, MASSACHUSETTS.

DOOR-KNOB.

SPECIFICATION forming part of Letters Patent No. 247,130, dated September 13, 1881.

' Application filed February 4,1881. (ModeL) To all whom it may concern Be it known that I, BENJAMIN D. STEVENS, of Cambridge, in the county of Middlesex, in the State of Massachusetts, a citizen of the United States, have invented a certain new and useful Improvement in Door-Knobs, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part ofthis speci- I0 fication,in explaining the nature of this invention, in which Figure 1 is a central section of a door-knob containing my improvement. Fig. 2 represents plans of the two sections of the knob separated, representing the interior construction.

Fig. 3 is a central section, representing a modification in construction.

This invention is an improvement upon that described in my application for Letters Patent of the United States filed August 16,1880. In said application I have described a door or other knob consisting of a core of cheap material, preferably made in two parts, to which is secured a veneering of celluloid. This invention is an improvement upon that, in that it modifies and simplifies the construction therein shown, and it is adaptable for knobs other than celluloid, or thosecovered with celluloid or other veneer.

The invention comprises the metal section or shell A of the knob, which is castin a suitable mold, and is provided with a central projection or post a cast therewith. The other section or shell,B,ot the knob is of any desirable shape, and is provided with a hole, 12, for the reception of the post a; the post may be provided with cars a, and the section B with corresponding recesses, b, by which it is prevented from turning on the post; but any other equivalent means may be employed for this purpose. The post is also provided with a hole, a for the reception of the spindle C. The sleeve D upon the projecting portion or end of the post a, in connection with the screw 01,

serves to fasten the two sectionsAB and post a firmly together, and the same screw may be used for fastening the post to the spindle C. If desired, the joint e, between the two sections, may be concealed by an independent ring, E,

which is provided with a-web, e, which extends betweetrthe two sections A and B, and with the extensions 0 and 6 which project substantially at rightangles from the web upon the outer surface of the two sections. This construction is preferable when the metal sections A and B are covered with aveneering of celluloid or other equivalent formative mate rial, as specified in my said application. If, however, celluloid or other veneer is not used, one of the two sections may have the lip F cast thereon and shaped to close over the joint e, substantially as shown in Fig. 3.

It the outer surfaces of the sections A and B are not to be covered with a veneer, they can be molded into any ornamental shape, and may be polished and plated, or either, or may be finished in any other desirable way.

The sleeve D may be of an ornamental character, if desired, and section B may not be a cast-metal shell, like section A, but may be of any other material than metal, and of any desired thickness. It is preferable, however, that it be a cast or struck-up metal shell.

It is desirable in some instances to cause the sleeve D to fit the post so snugly that it shall require to be driven thereon.

The advantages of this invention are cheapness and simplicity of construction.

Having thus fully described my invention,

I claim and desire to secure by Letters Patout of the United States 1. In a door or other knob, the combination of the cast-metal shell A, the post a, cast therewith, with the section B, and the sleeveD fastened to the post a, substantially as and for the purposes set forth.

2. In a door or other knob, the combination of the shell A, with or without a veneer, the post cast with said shell, the section B, with or without a veneer, ring E, and means for 0 fastening or locking the section, shell, post, and ring together, consisting of the sleeve D and screw (1, all substantially as and for the purposes described.

3. In a door or other knob, the combination 5 of the shell A, the post a, cast therewith and provided with ears a, with the section B, provided with the hole I) andrecesses I), all substantially as and for the purposes set forth.

BENJM. D. STEVENS.

WVitnesses:

F. F. RAYMOND, 2a., A. J. OETTINGER. 

